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BRC250/Proline 16803, that takes me back. That was one of my imaging setups in the past. The BRC250 is a great scope.
The linked image is a bit small to see properly. It looks very good but as mentioned the colour is a bit magenta. HaL + HaR GB is adventurous as a mix.
Generally speaking Ha as a Luminance blend gives detail but also salmon colours and wrecks the stars. HaR I haven't really experimented with but its probably putting the red back in the HaL is taking out.
Its always been a difficulty of Ha blends to get the colour without wrecking the stars, making an all red image or getting salmon colours. Therein is the processing challenge to get a workable formula for Ha blends.
Its like coffee!
Greg.
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